SOLVED - GnuTLS error -12: A TLS fatal alert has been received
Did a VSFTP server setup on Centos and updated the IP tables.
Configured a manual NAT on PFSense and tried to connect using Filezilla.
Got the following Error:
GnuTLS error -12: A TLS fatal alert has been received
Finally was able to fix it by adding the following line to the VSFTPD.conf file and restarted VSFTPD
Filezilla connected perfectly fine.